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/************************************************************************************
* arch/arm/src/str71x/str71x_internal.h
*
* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
#ifndef __ARCH_ARM_SRC_STR71X_STR71X_INTERNAL_H
#define __ARCH_ARM_SRC_STR71X_STR71X_INTERNAL_H
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include <arch/board/board.h>
/************************************************************************************
* Pre-procesor Definitions
************************************************************************************/
/* Calculate the values of PCLK1 and PCLK2 from settings in board.h.
*
* Example:
* STR71X_RCCU_MAIN_OSC = 4MHz (not divided by 2)
* STR71X_CLK2 = 4MHz
* STR71X_PLL1OUT = 16 * STR71X_CLK2 / 2 = 32MHz
* CLK3 = 32MHz
* RCLK = 32MHz
* PCLK1 = 32MHz / 1 = 32MHz
*/
/* PLL1OUT derives from Main OSC->CLK2 */
#ifdef STR71X_PLL1IN_DIV2 /* CLK2 is input to PLL1 */
# define STR71X_CLK2 (STR71X_RCCU_MAIN_OSC/2) /* CLK2 is OSC/2 */
#else
# define STR71X_CLK2 STR71X_RCCU_MAIN_OSC /* CLK2 is OSC */
#endif
#define STR71X_PLL1OUT ((STR71X_PLL1OUT_MUL * STR71X_CLK2) / STR71X_PLL1OUT_DIV)
/* PLL2 OUT derives from HCLK */
#define STR71X_PLL2OUT ((STR71X_PLL2OUT_MUL * STR71X_HCLK) / STR71X_PLL2OUT_DIV)
/* Peripheral clocks derive from PLL1OUT->CLK3->RCLK->PCLK1/2 */
#define STR71X_CLK3 STR71X_PLL1OUT /* CLK3 hard coded to be PLL1OUT */
#define STR71X_RCLK STR71X_CLK3 /* RCLK hard coded to be CLK3 */
#define STR71X_PCLK1 (STR71X_RCLK / STR71X_APB1_DIV) /* PCLK1 derives from RCLK */
#define STR71X_PCLK2 (STR71X_RCLK / STR71X_APB2_DIV) /* PCLK2 derives from RCLK */
/************************************************************************************
* Public Types
************************************************************************************/
/************************************************************************************
* Public Data
************************************************************************************/
/************************************************************************************
* Public Functions
************************************************************************************/
#endif /* __ARCH_ARM_SRC_STR71X_STR71X_INTERNAL_H */
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